This arm is designed for smaller diameter riser sections 1.25-1.50? (31-38cm) such as C-Stands. This side arm allows you to mount a light fixture anywhere along the riser section in just seconds, perfect for when you want to mount your light fixture lower than the height of the light stand itself. It also helps you save space and expense by allowing you to mount multiple light fixtures onto the same light stand. This is particularly useful when you need multiple fixtures to light a tall background evenly. It features a baby 5/8? (16mm) stud on top and directly below a baby receiver to give you multiple mounting options. It is 19.5? (50cm) in length to give you ample clearance to mount your light fixture or accessory away from the riser position. The arm features steel square tubing that is rigid and won’t flex under load.